Applying YAML changes blindly is risky. Preview exactly what will change first.
Before Applying:
# See what kubectl apply will change kubectl diff -f deployment.yaml # Output shows: # - Lines being removed # + Lines being added # ~ Lines being modified
Safe Workflow:
# 1. Check diff kubectl diff -f deployment.yaml # 2. Review changes carefully # 3. If looks good, apply kubectl apply -f deployment.yaml
Prevents accidental deletions or wrong configurations. Like git diff but for Kubernetes!